close

Privacy guaranteed - Your email is not shared with anyone.

Minimum Length for Brass

Discussion in '10mm Reloading Forum' started by 99blkta, Aug 3, 2010.


  1. 99blkta

    99blkta
    Expand Collapse

    Joined:
    Jun 26, 2010
    68
    0
    Location:
    TX
    So after a few firings I've noticed that my brass has begun to shrink. Is there a minimum case length?
     

    Wanna kill these ads? We can help!
  2. jeffreybehr

    jeffreybehr
    Expand Collapse
    GAPist #1944
    Silver Member

    Joined:
    Mar 14, 2009
    764
    2
    Location:
    Phoenix, AZ USA
    Don't you have a reloading manual? The trim-to length of the 10mm Auto is 0.982".
     

  3. 99blkta

    99blkta
    Expand Collapse

    Joined:
    Jun 26, 2010
    68
    0
    Location:
    TX
    Yea, I have two reloading manuals; however, I was unaware that the trim to length is the same as the minimum cartridge length. I'm still new to this and am trying to learn as much as possible. Thanks for the info.
     
    #3 99blkta, Aug 4, 2010
    Last edited: Aug 4, 2010
  4. Taterhead

    Taterhead
    Expand Collapse
    Counting Beans

    Joined:
    Dec 13, 2008
    3,582
    95
    Location:
    Boise, Idaho
    Yep. 0.982 is the minimum. I may fudge that by a couple of thousandths at the most - but only for my "volume" loads.
     
  5. jeffreybehr

    jeffreybehr
    Expand Collapse
    GAPist #1944
    Silver Member

    Joined:
    Mar 14, 2009
    764
    2
    Location:
    Phoenix, AZ USA
    YW, and sorry I sounded a bit abrupt.
     
  6. 99blkta

    99blkta
    Expand Collapse

    Joined:
    Jun 26, 2010
    68
    0
    Location:
    TX
    Not a problem, and thanks again for all the info.
     
  7. 99blkta

    99blkta
    Expand Collapse

    Joined:
    Jun 26, 2010
    68
    0
    Location:
    TX
    Other than trash the brass that is too short, what can be done with it? Trim it down to .40 lengths?
     
  8. Taterhead

    Taterhead
    Expand Collapse
    Counting Beans

    Joined:
    Dec 13, 2008
    3,582
    95
    Location:
    Boise, Idaho
    This has certainly been done, but certainly not preferable. The .40 S&W case is not exactly a shortened 10mm case. There are subtle case dimension differences, and the .40 calls for a small primer.

    I just toss 'em. They are less than 14 cents each from Starline, so not a huge loss to toss one out.
     
  9. 99blkta

    99blkta
    Expand Collapse

    Joined:
    Jun 26, 2010
    68
    0
    Location:
    TX
    Thanks, all I needed to know. :cool:

    Although its slightly disappointing that some of these cases only have 2 firings, eh oh well.
     
  10. Taterhead

    Taterhead
    Expand Collapse
    Counting Beans

    Joined:
    Dec 13, 2008
    3,582
    95
    Location:
    Boise, Idaho
    Interesting. What type of brass? I haven't experienced anything less than 4-5 shots, and that is with Winchester brass. Others, especially Starline, last longer. Granted, I only shoot hot loads in new brass - then they are relegated to the mid-strength rotation. So I am not as hard on my brass as some guys.
     
    #10 Taterhead, Aug 7, 2010
    Last edited: Aug 7, 2010
  11. 99blkta

    99blkta
    Expand Collapse

    Joined:
    Jun 26, 2010
    68
    0
    Location:
    TX
    All my brass has been new DT nickel plated. I do as you have stated and only load maximum recommended loads in the new brass, after that they are just used for "volume" loads. I'm quite surprised as well that I've only loaded some of these cases 2x. :wow: